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JSON Formatter & Validator Online Free
Format, validate and beautify JSON instantly in your browser.
verified_user Your files are processed locally in your browser. Nothing is uploaded to any server.
JSON is the most widely used data format in modern software development. Our free JSON formatter helps you quickly beautify minified JSON into a readable, indented format, or minify it back for production use. It also validates your JSON and shows clear error messages when the syntax is invalid — perfect for debugging API responses. Works entirely in your browser, no data is sent to any server.
Frequently Asked Questions
Can it validate JSON? +
Yes. If your JSON has a syntax error, the tool will highlight it and show the exact error message.
Can I minify JSON too? +
Yes. Use the 'Minify' button to compress JSON into a single line, ideal for production use.